Again (as expected); - only a load of empty words.
You have no idea at all of what is in fact the curvature of space really ?.
If you had you would have answered the questions.
Actually, quite a few of us understand the concept of intrinsic curvature in general relativity. We've given up on trying to explain it to you, because you just ignore the explanations and go on repeating your claim that no one understands the concept.
You don't have to provide even more evidence that
you don't understand the concept. We're convinced.
I can’t see that space at my head is bending.
There is no objective evidence that space bends/curves.
As
Reality Check wrote:
Your ignorance is amazing and seems to be increasing:
The objective evidence that space
bends/curves is: Tests of general relativity.
For Your Ignorance's (FYI) sake: GR is that gravity is a concequence of the
curvature of spacetime
.
First asked 12 July 2010
Bjarne,
Are you truly ignorant of the
objective evidence for
General Relativity?
Back to
Bjarne:
We can mathematically probes “something” happens to space, because of distances seems to change space near an object.
But that is all we "know".
We have try to explain that by poor words/expressions such as : The curvatures of space.
Curvature is exactly the right word for it.
Maybe it's time to demonstrate once again that
Bjarne is just ignoring all attempts at explanation. Here are two simple experiments he could conduct to explore the idea of intrinsic curvature in the physical world.
Experiment 1. Put a couple of rocks in your pocket and stand at the corner of a football (soccer) field. Face the goal and walk ten steps along the goal line; turn left, and walk ten more steps; drop one of your rocks. Return to the corner. Walk ten steps along the touchline; turn right, and walk ten more steps; drop your second rock.
If you took care to make right-angled turns and steps of equal length, then you'll drop your second rock pretty close to where you dropped your first rock. That means there isn't much curvature to that corner of the field.
Experiment 2. This experiment is similar to experiment 1, but on a much larger scale. For a variety of reasons that will become apparent should you attempt the experiment, this second experiment is most easily performed using an accurate scale model (globe
WP).
Start in Macapá
WP, at the half-way line of the football stadium. Face directly east; walk
10000 kilometers along the equator; turn left (north); walk another
10000 kilometers; drop a rock.
Return to your starting point. Face directly north; walk
10000 kilometers; turn right; walk another
10000 kilometers; drop your second rock.
With this experiment, your dropped rocks will be about
10000 kilometers apart. The first rock you dropped will be within a few kilometers of the North Pole. Your second rock will be within a few kilometers of the equator.
That's a demonstration of intrinsic curvature. It's a demonstration of the earth's curvature, not a demonstration of spacetime curvature, but the mathematical notion of curvature is the same for both. When
Bjarne says we don't understand what curvature means for spacetime, he's also saying we don't understand what it means for the earth
's surface to be curved. His accusations are absurd.
I have disproven the prevailing understanding of central gravity.
You have chosen to ignore it.
This tells more about you than about me.
I mean if you arrogant and condescending feel you have the right to call me a crackpot, liar, crank and I guess also crazy, - if moderator would accept so, - what would you say if I claim that you are brainwashed and programmed to automatically reject even objective evidence?
I'd say that fits with items 27, 28, 33, 34, and 36 in
John Baez's crackpot index.
I know you will not understand this but science is based on theories that predict objective mesurements that backed up by real experiments. So I will try to make this simple enough for you:
- General relativity uses a defintion of spacetime that allows spacetime to curve (or not), expand (or not) and contract (or not).
I will not try to explain this since it involves mathematics that is obviously beyond you.
- In general relativity, gravity is a consequence of the curvature of space time.
- General relativity produces numeric predictions for the effects of this curvature.
- These predictions have been tested over the last 95 years.
- The tests have all shown that GR's predictions are correct: Tests of general relativity.
!
), I know of a good resource: Leonard Susskind's lectures on Modern Physics (recorded September 22, 2008 at Stanford University) are on YouTube and include a 12 part series on General Relativity. This is a post-graduate course spanning almost 24 hours in total.
